UVR Demudders released in the beta Roformer patch

(in Anjok’s words)

• Phase Rotate:
  The fullest sounding, but can leave a lot of artifacts with certain models. I only recommend that method for the muddiest models. Otherwise, Combined Methods is the best”
  

• First, a filtered instrumental is created, and the left and right channels are swapped.
• The phase is shifted by 90 degrees.
• This modified filtered instrumental is then inverted with the original mixture, and another inference pass is performed on the resulting mixture.
• Finally, the vocal from the second pass is phase-inverted and combined with the original mixture, creating a cleaner instrumental.

 

• Phase Remix (similar to X-Minus; also available in this Colab):
  I don't recommend using phase remix on the Instrumental v1e model. I recommend combined methods or phase rotate for models producing fuller instrumentals.
  

• The mixture is first separated into stems.
• The phase of the vocal stem is inverted and mixed with the filtered instrumental to produce a modified "mixture." Another inference pass is performed on this new mixture.
• The vocal stem extracted from the modified mixture is then reintroduced into the original mixture, creating a cleaner instrumental.
• This method is only recommended for models that produce very muddy instrumentals!

 

• Combine Methods:
  

• It's basically a weighted mix of the final instrumentals generated by "Phase Rotate", "Phase Remix," and the initial instrumental.
  

Demudder in UVR doesn’t work on 4GB VRAM Intel/AMD GPUs
(more demudder troubleshooting)